Health and Human Services Secretary Robert F. Kennedy Jr. advocated for the MMR vaccine on Sunday in response to a growing measles outbreak in Texas. Why it matters: Kennedy has a long record of sowing skepticism about vaccines and last week appeared to downplay the situation in Texas when he described such outbreaks as "not unusual.

Robert F. Kennedy Jr., secretary of the Department of Health and Human Services (HHS), said the measles outbreak in west Texas is a “call to action,” as he encouraged parents to consider whether

The measles outbreak in Texas has quickly grown to 146 cases. One child has died. NBC News answers readers' questions about the disease, vaccines and government response.